{"id":198413,"date":"2026-04-29T00:22:13","date_gmt":"2026-04-29T00:22:13","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/knowledge\/?post_type=topic&#038;p=198413"},"modified":"2026-04-29T00:43:20","modified_gmt":"2026-04-29T00:43:20","slug":"freeflow-faqs-how-is-sph-adaptive-size-different-from-standard-sph-in-ansys-freeflow","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/freeflow-faqs-how-is-sph-adaptive-size-different-from-standard-sph-in-ansys-freeflow\/","title":{"rendered":"[FreeFlow FAQs] How is SPH Adaptive Size different from standard SPH in Ansys FreeFlow?"},"content":{"rendered":"<h1  id=\"\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-198416 size-full\" src=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330.png\" alt=\"\" width=\"1920\" height=\"358\" srcset=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330.png 1920w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-300x56.png 300w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-1024x191.png 1024w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-768x143.png 768w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-1536x286.png 1536w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-24x4.png 24w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-36x7.png 36w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2026\/04\/GPU-Buying-guide-v1-1-e1777422962330-48x9.png 48w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/h1>\n<h1  id=\"HOW-IS-SPH-ADAPTIVE-SIZE-DIFFERENT-FROM-STANDARD-SPH-IN-ANSYS-FREEFLOW\"><strong>How is SPH Adaptive Size different from standard SPH in Ansys FreeFlow?<\/strong><\/h1>\n<p>In standard SPH simulations:<\/p>\n<ul>\n<li>All SPH elements have the same size and spacing.<\/li>\n<li>Resolution is fixed throughout the simulation.<\/li>\n<li>Improving accuracy requires globally reducing SPH elements spacing.<\/li>\n<\/ul>\n<p>With <strong>SPH Adaptive Size<\/strong>:<\/p>\n<ol>\n<li>Element size can change locally during simulation.<\/li>\n<li>Resolution is higher only in selected regions or near boundaries.<\/li>\n<li>The overall number of elements can be significantly reduced compared to a uniform fine-resolution model.<\/li>\n<li>As a consequence of a lower number of SPH elements, the simulation execution time can be reduced.<\/li>\n<\/ol>\n<h6 class=\"paragraph\" style=\"text-align: right\" align=\"right\" class=\"paragraph\" style=\"text-align: right\" align=\"right\"  id=\"ANSYS-FREEFLOW-SMOOTHED-PARTICLE-HYDRODYNAMICS-SPH-SIMULATION-SOFTWARE\"><span class=\"eop\"><span style=\"font-size: 16.0pt\"><em>Ansys FreeFlow\u2122 smoothed-particle hydrodynamics (SPH) simulation software<\/em> <\/span><\/span><\/h6>\n<p style=\"text-align: right\" xml:lang=\"EN-US\" align=\"right\"><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-197810\" src=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/12\/author-foto.png\" alt=\"\" width=\"140\" height=\"143\" srcset=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/12\/author-foto.png 274w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/12\/author-foto-24x24.png 24w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/12\/author-foto-36x36.png 36w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/12\/author-foto-48x48.png 48w\" sizes=\"auto, (max-width: 140px) 100vw, 140px\" \/><\/strong><\/p>\n<h3 style=\"text-align: right\" style=\"text-align: right\"  id=\"JANAINA-OLIVEIRA\"><strong>Janaina Oliveira<\/strong><\/h3>\n<p style=\"text-align: right\"><em><strong>Technical\/Product Publications<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-198413","topic","type-topic","status-publish","hentry","topic-tag-freeflow-sph","topic-tag-sph","topic-tag-sph-adaptive-size","filter-by-application-ansys-freeflow"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_edit_lock":["1777467004:17114"],"_edit_last":["17114"],"_aioseo_title":[null],"_aioseo_description":[null],"_aioseo_keywords":["a:0:{}"],"_aioseo_og_title":[null],"_aioseo_og_description":[null],"_aioseo_og_article_section":[""],"_aioseo_og_article_tags":["a:0:{}"],"_aioseo_twitter_title":[null],"_aioseo_twitter_description":[null],"application_name":[""],"_application_name":["field_64a80903c8e15"],"filter_by_optics_product":["Lumerical"],"_filter_by_optics_product":["field_64fb192ba3121"],"family":[""],"_family":["field_64a809229a857"],"siebel_km_number":[""],"_siebel_km_number":["field_63ecbffce60db"],"salesforce_km_number":[""],"_salesforce_km_number":["field_63ecc018e60dc"],"km_published_date":[""],"_km_published_date":["field_64c77704499dd"],"product_version":[""],"_product_version":["field_64c776cb4fd2e"],"_bbp_forum_id":["27796"],"_bbp_topic_id":["198419"],"_bbp_author_ip":["192.104.24.234"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["198413"],"_bbp_last_active_time":["2026-04-29 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